【转】利用Bundle实现Android Activity间消息的传递

地址：http://www.iteye.com/topic/424491

利用Bundle是一种比较方便的办法。

程序的效果是活动A向B跳转的同时发送一字符串，B读出字符串。

先在AndroidManifest.xml中定义一个新的Activity，target：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ray.test"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".TestBundle"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

<activity android:name=".Target"></activity>
</application>
<uses-sdk android:minSdkVersion="3" />
</manifest>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.ray.test"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".TestBundle"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <activity android:name=".Target"></activity>
    </application>
    <uses-sdk android:minSdkVersion="3" />
</manifest> 

第一个活动的代码如下：

package com.ray.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MotionEvent;

public class TestBundle extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}

public boolean onTouchEvent(MotionEvent event) {
Intent intent = new Intent();
intent.setClass(TestBundle.this, Target.class);
Bundle mBundle = new Bundle();
mBundle.putString("Data", "ray'blog");//压入数据
intent.putExtras(mBundle);
startActivity(intent);
finish();
return super.onTouchEvent(event);
}
}

package com.ray.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MotionEvent;

public class TestBundle extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    
	public boolean onTouchEvent(MotionEvent event) {
		Intent intent = new Intent();
		intent.setClass(TestBundle.this, Target.class);
		Bundle mBundle = new Bundle();
		mBundle.putString("Data", "ray'blog");//压入数据
		intent.putExtras(mBundle);
		startActivity(intent);
		finish();
		return super.onTouchEvent(event);
	}
}

将要跳转到的活动代码：

package com.ray.test;

import android.app.Activity;
import android.os.Bundle;

public class Target extends Activity{

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Bundle bundle = getIntent().getExtras();
String data=bundle.getString("Data");//读出数据
setTitle(data);
}
}

package com.ray.test;

import android.app.Activity;
import android.os.Bundle;

public class Target extends Activity{
    
	public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Bundle bundle = getIntent().getExtras();  
        String data=bundle.getString("Data");//读出数据
        setTitle(data);
    }
}